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Proceedings Paper

Liquid crystals for terahertz technology
Author(s): Hongkyu Park; Fan Fan; Edward P. J. Parrot; Haewook Han; Vladimir G. Chigrinov; Emma MacPherson
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Paper Abstract

New terahertz (THz) optical devices which can control the optical properties of THz waves are needed to broaden the application area of THz technology. Liquid crystals (LCs) are very attractive materials for developing such devices because they have outstanding properties such as sensitivity to applied electric fields, chemical stability, relatively large birefringence and moderate absorption in the THz range. LCs need to be optimized to have a large birefringence and small absorption in the THz range. In this paper, we have investigated optical properties of a set of LCs in the THz range: E7, BL037, and RDP-97304. Optical parameters for the ordinary and extraordinary axis of LCs were acquired using THz time-domain spectroscopy and THz air-biased coherent detection system. We found that RDP-97304 has the largest birefringence and smallest absorption compared to E7 and BL037 in the THz range. It is thus a good candidate to design fast and efficient THz optical devices.

Paper Details

Date Published: 23 February 2012
PDF: 6 pages
Proc. SPIE 8261, Terahertz Technology and Applications V, 826107 (23 February 2012); doi: 10.1117/12.908504
Show Author Affiliations
Hongkyu Park, The Hong Kong Univ. of Science and Technology (Hong Kong, China)
Fan Fan, The Hong Kong Univ. of Science and Technology (Hong Kong, China)
Edward P. J. Parrot, The Chinese Univ. of Hong Kong (Hong Kong, China)
Haewook Han, Pohang Univ. of Science and Technology (Korea, Republic of)
Vladimir G. Chigrinov, The Hong Kong Univ. of Science and Technology (Hong Kong, China)
Emma MacPherson, The Hong Kong Univ. of Science and Technology (Hong Kong, China)


Published in SPIE Proceedings Vol. 8261:
Terahertz Technology and Applications V
Laurence P. Sadwick; Créidhe M. O'Sullivan, Editor(s)

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